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#!/bin/sh -e
# $Id$
# Copyright 2008-2023 Norbert Preining
# This file is licensed under the GNU General Public License version 2
# or any later version.
# 
# Creates an executable script update-tlmgr-r*.sh (in the current
# directory) for updating the texlive.infra package and its per-platform
# subpackages on Unix, similar to the .exe we create for Windows.  (Both
# are created in the nightly cron from tl-update-tlcritical.)  We use
# the makeself utility to create the executable.
# 
# The resulting update-tlmgr-*.sh is run (by the user) in the TL
# installation directory to be updated; it uses kpsewhich from PATH to
# determine what to do update.
# 
# Debugging/development/testing:
# - create test hierarchy; either run install-tl as you like, or:
#  tl-try-install Master/tlpkg/dev/profiles/TLinfra+exe.pro # or whatever
#   This creates /tmp/ki with various platforms.
# - then see tl-try-makeself:
#   running that will copy tlcritical to /tmp/krit,
#   run this script (tl-makeself-from-tlnet) there,
#   then update /tmp/ki from /tmp/krit, that is,
#   doing an update as a user would do in their installed hierarchy.
#
# update-tlmgr-r*.sh --list     # list files included in archive
# update-tlmgr-r*.sh -- --debug # run embedded script with -vx and more

mydir=`cd \`dirname "$0"\` && pwd`  # Master/tlpkg/bin
PATH=$mydir:$PATH # for tlpkginfo

TLNET=$1
if test ! -d "$TLNET"; then
  echo "$0: No tlnet directory given as argument, aborting." >&2
  exit 1
fi

ARCHIVE=$TLNET/archive
if test ! -d "$ARCHIVE"; then
  echo "$0: Subdirectory archive/ in $TLNET not found, aborting." >&2
  exit 1
fi

# extract some version values from the tlnet tlpdb.
NETRELEASE=`sed -n 's!^depend release/!!p' "$TLNET/tlpkg/texlive.tlpdb"`
MINRELEASE=`sed -n 's!^depend minrelease/!!p' "$TLNET/tlpkg/texlive.tlpdb"`
if test -z "$NETRELEASE" || test -z "$MINRELEASE"; then
  echo "$0: could not find (min)release in $TLNET/tlpkg/texlive.tlpdb, bye"\
  >&2; exit 1
fi

CWD=`pwd`        # save original dir
TMP=`mktemp --suffix=tlmksel -d`  # work in new temp dir
cd "$TMP"
mkdir master
cd master

# unpack texlive.infra archives for all platforms, except w32.
# this gives us the tlpobj files along with the actual content files.
infrapkg=texlive.infra
#
# determine revision of infrastructure while we're here,
# for naming the archive later.
infrarev=`tlpkginfo --revision $infrapkg "$TLNET"`
if test -z "$infrarev"; then
  echo "$0: tlpkginfo --revision $infrapkg $TLNET failed, goodbye." >&2
  exit 1
fi
#
for i in "$ARCHIVE"/$infrapkg*.tar.xz; do
  : "uncompressing $i" # for debugging
  xz -d <"$i" | tar -xf - || exit 1
done

cd .. # back to the (temp) dir where we building things up

# 
# create the script which will be run on the user's machine to do the update.
# 
cat >runme.sh <<END_RUNME
#!/bin/sh
# \$Id$
# Updater for tlmgr and TL infrastructure on Unix. Public domain.
# Runs in unpacked archive directory.
# Created by `basename $0` at `date`.

creation_date="`date`"
NETRELEASE=$NETRELEASE
MINRELEASE=$MINRELEASE
infrapkg=$infrapkg
END_RUNME

# append to runme literally now -- no more variable expansions.
cat >>runme.sh <<'END_RUNME'

# see if we can determine where the TL to be upgraded lives.
# need tlpdb and a tlpobj dir (i.e., not the svn Master tree) at least.
# We are depending on the user's PATH to find kpsewhich, tlmgr, etc.
ROOT=`kpsewhich --var-value=SELFAUTOPARENT`
if test -r "$ROOT/tlpkg/texlive.tlpdb" && test -d "$ROOT/tlpkg/tlpobj/"; then
  echo "$0: updating in $ROOT..."

  tlmgrversion=`tlmgr version | grep '^TeX Live.*version' | awk '{print $NF}'`
  if test -z "$tlmgrversion"; then
    echo "$0: tlmgr version did not include version, goodbye." >&2
    tlmgr version >&2
    echo "($0: makeself creation date = $creation_date.)" >&2
    exit 1
  fi
  #
  echo "$0: tlmgr version says this is TeX Live $tlmgrversion,"
  echo "$0: and this updater script created: $creation_date."
  #
  # Extra-verbose debugging option.
  if test "x$1" = "x--debug"; then
    shift
    opt_debug=1
    set -vx
  else
    opt_debug=
  fi
  #
  if test "x$1" = "x--upgrade"; then
    if test "x$NETRELEASE" = "x$tlmgrversion"; then
      echo "$0: have TL $tlmgrversion, new version also $NETRELEASE;">&2
      echo "$0: using --upgrade doesn't make sense; terminating." >&2
      echo "($0: makeself creation date = $creation_date.)" >&2
      exit 1
    elif test "$tlmgrversion" -lt "$MINRELEASE"; then
      echo "$0: upgrading from $tlmgrversion not supported;" >&2
      echo "$0:   can only upgrade from $MINRELEASE to $NETRELEASE." >&2
      echo "$0: terminating." >&2
      echo "($0: makeself creation date = $creation_date.)" >&2
      exit 1
    else
      echo "$0: ok, doing full release upgrade " \
           "from $tlmgrversion to $NETRELEASE."
    fi
  else
    echo "$0: proceeding with tlmgr update."
  fi

  # move the architecture-specific files away so we don't blindly copy
  # them all. The loop below and tlmgr invocation at the end will update.
  mv ./master/bin .
  mkdir ./installer
  mv ./master/tlpkg/installer/tar.exe ./installer
  mv ./master/tlpkg/installer/xz   ./installer
  mv ./master/tlpkg/installer/wget ./installer
  mv ./master/tlpkg/installer/lz4  ./installer # could be anywhere

  # install the architecture-independent files.
  (cd master && tar cf - *) | (cd "$ROOT" && tar xf -) || exit 1

  t_instdir=$ROOT/tlpkg/installer  # target installer dir
  t_xzdir=$t_instdir/xz
  t_wgetdir=$t_instdir/wget
  #
  # ensure these target directories exist.
  mkdir -p "$t_xzdir" "$t_wgetdir"

  # Start the list of tlpobjs we will install with the
  # platform-independent part of the infrastructure package.
  # 
  # We use the tlpobjs from our own dir here, using relative names,
  # since we constructed this directory tree and thus know there are no
  # spaces in the names. That is not true for $ROOT. (The files are the
  # same since we just updated $ROOT with the untar above.)
  src_tlpobj=master/tlpkg/tlpobj
  tlpobjs=$src_tlpobj/$infrapkg.tlpobj

  if test -n "$opt_debug"; then
    (: "here (`pwd`):"; ls) >&2
    (: "installer:"; ls installer) >&2
    (: "installer/wget:"; ls installer/wget) >&2
    (: "installer/xz:"; ls installer/xz) >&2
    (: "ROOT/bin=$ROOT/bin:"; ls "$ROOT"/bin) >&2
  fi

  # for each installed directory of binaries ...
  for a in "$ROOT"/bin/*; do
    test -d "$a" || continue  # skip any cruft files
    b=`basename "$a"`         # just the architecture name
    # skip 'man' directories if they are still present
    if test "$b" = "man"; then
      continue
    fi
    echo "$0: updating $a ..."

    # add the tlpobjs for this platform to the list.
    tlpobjs="$tlpobjs $src_tlpobj/$infrapkg.$b.tlpobj"

    # install the bin dir for this platform.
    (cd bin >&2 && tar cf - "$b") | (cd "$ROOT/bin" && tar xf -) || exit 1

    # copy the xz binaries:
    if test -r installer/xz/xz."$b"; then
      cp installer/xz/xz."$b" "$t_xzdir/" || exit 1
    elif test -r installer/xz/xz."$b".exe; then
      # with .exe, for Cygwin.
      cp installer/xz/xz."$b".exe "$t_xzdir/" || exit 1
    elif echo "$b" | egrep 'win32|windows' >/dev/null \
         && test -r installer/xz/xz.exe; then
      # annoyingly, we left windows out of the name, special cases all around:
      cp installer/xz/xz.exe "$t_xzdir/" || exit 1
      cp installer/wget/wget.exe "$t_wgetdir/" || exit 1
      cp installer/tar.exe "$t_instdir/" || exit 1
    else
      echo "$0: no xz.[$b][.exe] binary for $a in `pwd`/installer/xz." >&2
      exit 1
    fi
    #
    # Cygwin (among others) does not need to provide wget, so don't
    # worry about .exe here.
    test -r installer/wget/wget.$b \
      && { cp installer/wget/wget.$b "$t_wgetdir/" || exit 1; }
  done

else
  cat <<END_ABORT_NODIR >&2
$0: Cannot find TeX Live root using kpsewhich --var-value=SELFAUTOPARENT.
$0: (no tlpkg/texlive.tlpdb and/or tlpkg/tlpobj/.)
$0: Please set your PATH as needed, otherwise it's hopeless.
END_ABORT_NODIR
  exit 1
fi

# Invoke special tlmgr action with the tlpobjs we found.
# Hopefully the result will be a clean tlpdb state.
# We are running the new tlmgr, from our own archive, here,
# due to the untar above.
tlmgr_path=`which tlmgr 2>/dev/null`      # provide complete path if we can
test -z "$tlmgr_path" && tlmgr_path=tlmgr # but no biggie if we can't
echo "$0: $tlmgr_path including objects: $tlpobjs"
#debug: (pwd; ls -l $tlpobjs; ls -lR) >/tmp/ls
#debug: -vv here gives more info. (Also -vx on the #! line above.)
if tlmgr -v _include_tlpobj $tlpobjs; then :; else
  echo "$0: $tlmgr_path failed, goodbye." >&2
  exit 1
fi
echo "$0: done."
END_RUNME

# 
#debug: cp -f runme.sh /tmp
chmod ugo+x runme.sh

# make the self-extracting archive back in the directory from which
# we were invoked.
cd "$CWD"

# we must use the non-distro (Alma Linux 8) version of makeself, because
# that happened to have a bug causing unnecessary hard links to end up
# in the archive, which bsdtar (aka macOS) fails on.
# https://tug.org/pipermail/tlu/2023-November/000639.html
/usr/local/share/makeself/makeself.sh -q --keep-umask \
  $TMP \
  update-tlmgr-r$infrarev.sh \
  "TeX Live Manager Updater" \
  ./runme.sh

rm -rf $TMP

# vim:set tabstop=2 expandtab: #